OEM Carrier Pressure Switch with Bracket for Model PG8DAA036050AAJA

This OEM pressure switch with bracket (Part# HK06WC090) is the factory-specified replacement for the Carrier PG8DAA036050AAJA gas furnace. The pressure switch is a critical safety component that monitors negative pressure created by the inducer motor during the pre-ignition purge cycle. When the switch confirms adequate inducer airflow, it closes and allows the ignition sequence to proceed. A failed or out-of-tolerance pressure switch will keep the furnace locked out before ignition — you may see a fault code indicating a pressure switch fault, hear the inducer motor running continuously with no heat output, or experience repeated short-cycling.

• Specs: Includes factory mounting bracket | Single-port pressure switch | 24V control circuit compatible | Factory-calibrated water column (W.C.) rating matched to PG8DAA036050AAJA inducer specifications
• OEM vs Generic: This OEM unit is calibrated to the exact W.C. trip point Carrier specifies for this model. Off-spec generic switches can trip too early or too late, causing nuisance lockouts or — more dangerously — failing to detect a blocked flue condition.
• Install Difficulty: 2/5 — Power down and lock out the furnace before beginning. Tools needed: flathead and Phillips screwdriver, 1/4" nut driver, needle-nose pliers. Disconnect the pressure hose, unplug the wiring harness, unmount the old bracket, and reverse steps to install. Always check the hose for cracks or blockages before replacing the switch.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier PG8DAA036050AAJA packaged gas furnace. Verify your existing switch's W.C. rating and port configuration against your unit's wiring diagram before ordering. Our fitment specialists are available to confirm compatibility — just reach out before you order. Order now and get same-day shipping on all in-stock OEM Carrier parts.